Stratigraphical framework for the Ordovician of Snowdonia and the Lleyn Peninsula : a discussion of the Tremadoc to Caradoc rocks lying between the Menai Straits and the Llanderfel Syncline, and including an appendix on Cambrian rocks. Version 2

Rushton, Adrian; Howells, Malcolm.
1999
Stratigraphical framework for the Ordovician of Snowdonia and the Lleyn Peninsula : a discussion of the Tremadoc to Caradoc rocks lying between the Menai Straits and the Llanderfel Syncline, and including an appendix on Cambrian rocks. Version 2.
Keyworth, Nottingham, British Geological Survey, 41pp.
(RR/99/008)